[driverloader] slow operation of 3-com 3crwe254g72
darin at opt-imaging.com
Mon Dec 6 22:27:14 EST 2004
I've just installed DriverLoader 2.10 under a 2.6.9 kernel to support a
3-com 3crwe254g72 USB wireless interface. The wrapped driver is 3Com's
latest -- 220.127.116.11. The installation went smoothly, the device works (and
thanks & a license fee are due to Linuxant for the great product), but
the link is rather slow.
Link Quality=94/94 Signal level=-31 dBm Noise level=-154 dBm
However, no transfer seems to get above about 5Mb/sec under Linux.
Booting into WinXP, I can get 15-20 Mb/sec using the same hardware and
Perhaps related to the slowdown is that a significant number of Invalid
misc errors are logged -- a few hundred a second during a large file
transfer, for example. None of the documentation I can find tells me
what specific problem this might point to.
I've tried prodding a few of the iwconfig parameters, but nothing seems
to have any effect--either to slow or speed things up. Even the rate
parameter appears to be ignored; I get "54 Mb/s" no matter what I try to
set it to.
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